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From:   Jianjun Wang <jianjun.wang@mediatek.com>
To:     Bjorn Helgaas <bhelgaas@google.com>,
        Rob Herring <robh+dt@kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Ryder Lee <ryder.lee@mediatek.com>
CC:     Matthias Brugger <matthias.bgg@gmail.com>,
        <linux-pci@vger.kernel.org>, <linux-mediatek@lists.infradead.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        Jianjun Wang <jianjun.wang@mediatek.com>,
        <youlin.pei@mediatek.com>, <chuanjia.liu@mediatek.com>,
        <qizhong.cheng@mediatek.com>, <sin_jieyang@mediatek.com>,
        <drinkcat@chromium.org>, <Rex-BC.Chen@mediatek.com>,
        Krzysztof Wilczyski <kw@linux.com>, <Ryan-JH.Yu@mediatek.com>
Subject: [PATCH v2 1/2] dt-bindings: PCI: mediatek-gen3: Add property to disable dvfsrc voltage request
Date:   Fri, 11 Jun 2021 19:48:23 +0800
Message-ID: <20210611114824.14537-2-jianjun.wang@mediatek.com>
In-Reply-To: <20210611114824.14537-1-jianjun.wang@mediatek.com>
References: <20210611114824.14537-1-jianjun.wang@mediatek.com>
MIME-Version: 1.0
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Add property to disable dvfsrc voltage request, if this property
is presented, we assume that the requested voltage is always
higher enough to keep the PCIe controller active.

Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com>
Reviewed-by: Qizhong Cheng <qizhong.cheng@mediatek.com>
Tested-by: Qizhong Cheng <qizhong.cheng@mediatek.com>
---
 .../devicetree/bindings/pci/mediatek-pcie-gen3.yaml       | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
index e7b1f9892da4..3e26c032cea9 100644
--- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
+++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
@@ -96,6 +96,12 @@ properties:
   phys:
     maxItems: 1
 
+  disable-dvfsrc-vlt-req:
+    description: Disable dvfsrc voltage request, if this property is presented,
+      we assume that the requested voltage is always higher enough to keep
+      the PCIe controller active.
+    type: boolean
+
   '#interrupt-cells':
     const: 1
 
@@ -166,6 +172,8 @@ examples:
                      <&infracfg_rst 3>;
             reset-names = "phy", "mac";
 
+            disable-dvfsrc-vlt-req;
+
             #interrupt-cells = <1>;
             interrupt-map-mask = <0 0 0 0x7>;
             interrupt-map = <0 0 0 1 &pcie_intc 0>,
-- 
2.25.1